管线呈水平横越的结构是（）跨越结构。A、横跨式 B、梁式 C、横越式 D、跨越式

完形填空。

Around the world, people have different ideas about what good manners are.      When you go to restaurants in different parts of the world, it's  1  to know the right and wrong things to do. For example, in China it's OK to  2  a lot of noise in a restaurant. In fact, if a restaurant isn't  3  or lively, you may think there's something wrong with it. However, in many western countries, restaurants are quiet places. If a table is too loud, other people who are eating there might even  4  to the owner of the restaurant.     Paying the bill  5  also different from country to country. In China, one person usually pays  6  everybody. In western countries, one person pays if he or she is entertaining clients (宴请宾客), but  7  friends eat together, they usually share the cost. This is called "Going Dutch (均摊费用)". Also, when westerners pay the bill, they usually leave some money for the  8 .This is called"leaving a tip (小费)". Leaving a tip is thought to be polite. In the US, it's  9  to leave tips of 10％,15％,or 20％ of the bill, which is decided by how good the service is. Good waiters can make a lot of money!      The way people eat food is different in the world, but you can  10  the same kind of food in many countries. Chinese and Italian food, for example, are popular all over the world.

( )1. A. popular   ( )2. A. cause     ( )3. A. noisy     ( )4. A. shout     ( )5. A. are       ( )6. A. on        ( )7. A. until     ( )8. A. gatekeeper ( )9. A. terrible  ( )10. A. invent   B. difficult B. keep     B. noise    B. explain  B. is       B. for      B. when     B. seller   B. common   B. find     C. important C. make     C. lucky    C. complain C. be       C. in       C. unless   C. waiter   C. serious  C. prefer

图中，杂技演员在表演水流星节目时，盛水的杯子在竖直平面内做圆周运动，当杯子经过最高点时，里面的水也不会流出来，这是因为（     ）

A．水处于失重状态,不受重力的作用

B．水受的合力为零

C．水受的合力提供向心力，使水做圆周运动

D．杯子特殊，杯底对水有吸引力

鹧鸪天 代人赋

^①
辛弃疾
陌上柔桑破嫩芽，东邻蚕种已生些。平冈细草鸣黄犊，斜日寒林点暮鸦。山远近，路横斜，青旗^②沽酒有人家。城中桃李愁风雨，春在溪头荠菜花。
[注]①这首词作于作者遭弹劾解官归居时。②青旗：酒旗，酒店门外用青布做的幌子。

词的最后两句作者用了哪种写作手法表达了什么样的感情词题为“代人赋”，作者为什么要以此为题请简要说明。

使用不久的等臂双盘电光天平的灵敏度不合要求，则应以（）细致地调整重心。

A、水平调整脚

B、感量螺丝

C、平衡螺丝

D、调零杆

计量原始数据包括哪些部分？