配制100ml 2%头孢噻吩钠溶液，需加入多少克氯化钠使其成等渗(E=0.24)()

骨盆底形态学特征正确的是

A．外层为盆膈

B．中层为泌尿生殖膈

C．肛门外括约肌属盆膈范畴

D．球海绵体肌有松弛 * * 作用

E．肛提肌是组成骨盆底外层的肌肉

小题1:Why did you keep ________(沉默) at the meeting? We need your suggestions!

小题2:Kangkang’s father is going to Shanghai on _________. (出差)

小题3:The trees have a great _______ (影响) on the climate.

小题4: He has ________ (成功)in winning the first prize in the game recently.

小题5: This is my personal ________（经历）. What about yours?

小题6:There is no doubt that Diaoyu Island _________(属于)to China.

小题7:Thank you for ________(邀请) me to go on holiday with you.

YYn0联结组标号可供三相动力和照明用电。（）

在实现Serializable的类中，静态变量和使用 【13】 关键字可以使某些数据不被串行化。

转速调节分为（）和无差调节。

A、有差调节

B、反馈调节

C、间接调节

D、直接调节