大型管道试验引用了()试验作为判定合格的试验方法。
A.全程
B.分段
C.闭气
D.单口
参考答案:C
—I don't feel myself now.
—________
A.Don't do that,please.
B.It's impossible.
C.What's the matter?
D.Why do you want to feel yourself?
叶海卡.德洛尔的著作《政策科学的构想》成为()的第二道分水岭。