下列叙述正确的是 A．同一主族的元素的氢化物，相对分子质量越大，它的沸点一定越高

测量脊柱旋转角度的方法常用Nash-Mod法，根据正位X线片上椎弓根的位置，将其分为（）度。

A.1

B.2

C.3

D.4

E.5

小题1:Her grandparents bought her a pink _______(钱包). It really made her feel happy.

小题2:We should try our best to protect our__________(环境)•

小题3:The______(口号）of Beijing Olympic Games is “One World, One Dream.”

小题4:His father is a _________(农夫). So he likes working in the field.

小题5:If you want to learn how to use the new software, you should go there on _____(星期三).

回锅肉在煮制时，肉的成熟度应该是______程度。

A．软烂

B．半生

C．断生

D．八成熟

下列有关胸外心脏按压的叙述错误的是

A．平卧，背部垫硬板
B．每按压15次做2次口对口呼气
C．按压次数每分钟50～60次
D．按压时双肘伸直
E．按压时使胸骨下陷4cm