常用于治疗口歪、痛经、小便不利的腧穴是()。常用于治疗疝气、阴中痛的腧穴是()。
A.期门
B.大敦
C.隐白
D.中脘
E.太冲
参考答案:E,B
The boy doesn't speak ______ his sister, but his writing is ______ good.[ ]
A. as well as, so
B. more worse than, such
C. as well as, such
D. worse than, so
某元素M所形成的气态单质分子M2有三种,其相对分子质量分别为70、72、74,三种分子的物质的量之比为9∶6∶1,下列说法中正确的是 [ ]
A.M有三种同位素
B.M2的平均相对分子质量为72
C.质量数为35的同位素占原子总数的百分数为75%
D.M的一种同位素的质量数为37