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【单选题】
我国的基本国策是A.
计划生育
B.
提高人口质量
C.
控制人口的质量
D.
降低人口数量
E.
晚婚晚育
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反馈参考答案：
举一反三
【单选题】Parents worry about _________online.
A.
who do their children chat with
B.
who their children chat with
C.
with who their children chat
D.
who their children chats with
【单选题】He is a ________and well-behaved child, but his parents worry about him for he talks too little.
A.
obedient
B.
transient
C.
conscious
D.
passionate
【简答题】Watson与Crick发现DNA双螺旋结构的故事可以给我们哪些启示?
【单选题】—Is it that Jack often plays computer games makes his parents worry about him ? —Yes , I think so .
A.
what
B.
when
C.
that
D.
which
【简答题】Which sort of issues that parents worry about is NOT mentioned in the news?A. Negative body image. B. Sleeping
disorders. C. Depression. D. Poor
ual choices.
【单选题】Watson和Crick发现了DNA双螺旋的结构,开启了分子生物学时代,使遗传的研究深入到分子层次,“生命之谜”被打开,这项成果发表时间是( )
A.
1960
B.
1950
C.
1945
D.
1953
E.
其余选项都不对
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