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【单选题】
下列关于核酸的叙述，正确的是( )A.
DNA和RNA中的五碳糖相同
B.
组成DNA与ATP的元素种类不同
C.
T 2 噬菌体的遗传信息贮存在RNA中
D.
DNA分子中嘌呤数等于嘧啶数
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【简答题】all the time, It’s about time that, ahead of time, at any time, at the same time,
【单选题】It’s about time that he along well with his classma
A.
to get
B.
got
C.
have
D.
should
【单选题】It’s about time that people __ notice of what women did during the war.
A.
took
B.
take
C.
have taken
D.
will taken
【多选题】单向板肋梁楼盖按弹性理论计算时，对于板和次梁不论其支座是墙还是梁，均视为铰支座，由此引起的误差可在计算时所取的（ ）加以调整。
A.
跨度
B.
荷载
C.
弯矩值
D.
剪力值
【判断题】销的主要用途是固定零件之间的相互位置，并可传递不大的载荷。圆柱销经过多次装拆，其定位精度会降低。圆锥销的安装比圆柱销方便，多次安装对定位精度的影响也较小。
A.
正确
B.
错误
【单选题】It’s about time that he along well with his classmates.
A.
to get
B.
got
C.
have
D.
should
【单选题】It’s about time that the question _____ now.
A.
solved
B.
were solved
C.
be solved
D.
was solved
【多选题】单向板肋梁楼盖按弹性理论计算时，对于板和次梁不论其支座是墙还是梁，均视为铰支座，由此引起的误差可在计算时所取的（）加以调整。
A.
跨度
B.
荷载
C.
剪力值
D.
弯矩值
【单选题】It’s about time (that) he —— to look after himself.
A.
learning
B.
learn
C.
should learned
D.
learned
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