【名词&注释】
马铃薯(potato)、商品经济(commodity economy)、分水岭(watershed)、不符合(inconformity)、价格便宜(cheap price)、木栓形成层(cork cambium)、性能好(good performance)、中柱鞘(pericycle)、羽状复叶(pinnately compound leaf)
[单选题]木栓形成层只能来自中柱鞘(pericycle)。( )
A. 正确
B. 错误
查看答案&解析
举一反三：
[单选题]下列关于秦朝历史的表述，不符合史实的是（ ）。
A. 郡县长官均由皇帝任免
B. 太尉负责管理全国军事
C. 小篆以外出现了隶书
D. 私学也可以教授律令
[单选题]
B． rest
C． walk
D． game
A. talkB． rest
B. walk
C. game
[单选题]
A. repeated
B. reviewed
C. spelled
D. kept
[单选题]15明代《闽部疏》载：“凡福之紬(绸)丝……福漳之桔，福兴之荔枝，泉漳之糖．颛昌之纸，无日不走分水岭及浦城之小关．下吴越如流水。其航大海而去者尤不可计，皆衣被天下。”材料反映明代福建
A. 海陆交通十分发达
B. 商品经济活跃
C. 成为全国经贸中心
D. 出现资本主义萌芽
[单选题]CFood sometimes gets poisoned with harmful things. A person who eats such food can get an illness called food poisoning. Food poisoning is usually not serious, but some types are deadly. The symptoms of food poisoning usually begin within hours of eating the poisoned food. Fever is one of the most common symptoms.
A. Certain microorganisms（微生物）cause most types of food poisoning. Bacteria and other microorganisms can poison eggs, meat, vegetables, and many other foods. After entering the body, these tiny living things release（释放）poisons that make people sick.
B. Some chemicals can also cause food poisoning. They are often added to food while it is being grown, processed, or prepared. For example, many farmers spray chemicals on crops to kill weeds and insects. Some people may have a bad reaction to those chemicals when they eat the crops.
C. Some plants and animals contain natural poisons that are harmful to people. These include certain kinds of seafood, grains, nuts, seeds, beans, and mushrooms.
D. When people handle food properly, the risk of food poisoning is very small. Microorganisms multiply rapidly in dirty places and in warm temperatures. This means that people should never touch food with dirty hands or put food on unwashed surfaces. Food should be kept in a refrigerator to stop microorganisms from growing. Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered with chemicals before eating it. Finally, people should not eat wild mushrooms or other foods that grow in the wild. Some of these foods may contain natural materials that are poisonous to humans. In addition, some types of fish can be poisonous.
E. Most people recover from food poisoning after a few days of resting and drinking extra water. If people eat natural poisons, they must go to the hospital right away to have their stomachs emptied.
F. 51. Which of the following statements is NOT true?
G. Food when poisoned can make people sick.
H. Food poisoning means death.
I. Food poisoning comes in varieties.
J. Food poisoning can be serious.
[单选题]全株被黏质腺毛，叶为羽状复叶(pinnately compound leaf)或羽状分裂。
A. 马铃薯
B. 辣椒
C. 番茄
D. 烟草
[单选题]对膜剂成膜材料的要求，不正确的是（ ）。
A. 生理惰性
B. 性能稳定
C. 眼用的、腔道用的膜材要有好的脂溶性
D. 成膜、脱膜性能好(good performance)
E. 来源丰富、价格便宜
[单选题]下列植物属于子叶留土的是( )。
A. 棉花
B. 蓖麻
C. 大豆
D. 小麦
[单选题]
A. chief
B. basic
C. actual
D. total
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