【名词&注释】
马尾松(masson pine)、禾本科植物(grass)、金钱松(golden larch)、DNA分子结构、磷酸二酯(phosphodiester)、脱氧核糖(deoxyribose)、缠绕茎(twining stem)、红豆杉纲(taxopsida)
[单选题]具二型叶。
A. 雪松
B. 马尾松和红松
C. 金钱松和水杉
D. 冷杉和云杉
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举一反三：
[单选题]的孢子叶球均为单性同株。
A. 松科植物
B. 银杏和铁树
C. 柏科植物
D. 红豆杉纲(taxopsida)植物
[单选题]黄瓜茎幼时柔软，不能直立，属于缠绕茎(twining stem)。( )
A. 正确
B. 错误
[单选题]What does the writer dislike most about dinner parties in New Yorkers
A. There is a strange mix of people.
B. The restaurants are expensive.
C. The bill is not fairly shared.
D. People have to pay cash
[单选题]Not until I came home last night ________ to bed.
A. Mum did go
B. did Mum go
C. went Mum
D. Mum went
[单选题]
A. entire
B. normal
C. average
D. general
[多选题].有关DNA分子结构的叙述，正确的是
A. DNA分子由4种脱氧核苷酸组成
B. DNA单链上相邻碱基以氢键连接
C. 碱基与磷基相连接
D. 磷酸与脱核糖交替连接构成DNA 链的基本骨架
[单选题]It was a nice house, but _______ too small for a family of live.
A. rarely
B. fairly
C. rather
D. pretty
[单选题]同禾本科植物一样，姜科植物叶也有叶鞘和叶舌。( )
A. 正确
B. 错误
[单选题]Doctors say that exercise is important for health, but it _______ be regular exercise.
A. can
B. will
C. must
D. may
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