【名词&注释】
混合物(mixture)、氯化钾(potassium chloride)、氧化铜(copper oxide)、地球表面(earth surface)、基因组成(genetic constitution)、总面积(total area)
[单选题]糖类
A. 盐酸
B. 氯化钾
C. 氧化铜
D. 淀粉
E. 五氧化二磷 F．氮气 G．氢氧化钙 H．甲烷
查看答案&解析
点击获取本科目所有试题
举一反三：
[单选题]According to his plan, his plane should have taken off at _______.
A. 6:30
B. 7:00
C. 7:30
D. :8:00
[单选题]一元二次方程x2+x-2=0 的两根之积是（ ）
A. -1
B. -2
C. 1
D. 2
[单选题]地球表面陆地的面积约占全球总面积(total area)的： （ ）
A. 29%
B. 48%
C. 71%
D. 90%
[单选题]57．
A. better
B. good
C. best
D. well
[单选题]下列各种物质中属于混合物的是（ ）
A. 空气 B．氧气
B. 氮气 D．二氧化碳
[单选题]23． If Simon is feeling stressed，he should _______ ．
A. do much more homework
B. make a plan to spend time on study and hobbies
C. donate(捐赠) his pocket money to Project Hope
D. buy some snacks
[单选题]用基因组成(genetic constitution)是AA的蜜桃枝条为接穗，嫁接到基因组成(genetic constitution)为aa的蜜桃砧木上，所结蜜桃果肉细胞的基因组成(genetic constitution)为Aa的几率是：
A. 25%
B. 75%
C. 100%
D. 0%
[单选题]_________ ．Where
A. Sorry
B. I’m sorry
C. OK
D. Excuse me
[单选题]15．
A. in
B. for
C. to
D. at
本文链接：https://www.zhukaozhuanjia.com/download/g4rgwe.html
