下列选项中，关于现浇混凝土基础需要描述的项目特征，叙述不正确_爱下问搜题

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问题单项选择题

下列选项中，关于现浇混凝土基础需要描述的项目特征，叙述不正确的是( )。

A．混凝土强度等级越高，混凝土的抗压强度要求越高
B．框支梁、框支柱的混凝土强度等级不应低于C20
C．一级抗震等级的框架粱、柱、节点的混凝土强度等级不应低于C30
D．砂浆强度等级采用基础二次灌浆需要的砂浆

答案

参考答案：B

完形填空

When I was a young student, a Chinese teacher told us, “If you make one close friend in school, you will be most fortunate. A true friend is someone who stays with you for life.”   36   tells us that he was right. Good friendship is just not easily   37 . It is possible that we simply do not stay in one place long enough for   38  friendship to   39 .
However, there can be   40  disagreement on the need for each of us to think carefully about the kind of friendship we want. To most of us, friendships are considered very important, but we need to have clear in our   41   the kinds of friendship we want. Are they to be close or   42   at arm’s length? Do we want to   43  ourselves or do we want to walk on the surface? For some people, many friendships on the surface are   44  enough—and that’s all right. But at some point we need to   45   that our expectations are the same as our friends’ expectations. The sharing of   46  experience   47  our tears as well as our dark dreams is the surest way to deepen friendships. But it   48  be undertaken（进行）slowly and carried on only if there are   49  of interest and action in return.
What are some of the   50  of friendship? The greatest is the attraction to expect too much too soon. Deep relationships   51  time. Another “major difficulty” is the selfishness to think one “possesses” the other, including his time and attention. Similarly, friendships   52  actions in return. In   53  words, you must give as much as you take.
Finally there is a question of taking care of. Unless you spend   54  time together, talking on the phone, writing letters, doing things together, friendships will die   55 .

D．check out

B．personal

D．to include

A．difficulties

B．differences

D．different

A．comfortable

问答题简答题

药物不良反应会改变吗？为什么？