硝酸甘油有效的是()。
A.肺梗死
B.心绞痛
C.胸膜炎
D.肋间神经炎
E.胸壁炎症
参考答案:B
在千分尺上读尺寸时,一般可分为哪三个步骤?
If you can improve your price by 3%,we shall be prepared to()for 5,000 metric tons.
A.book with you an order
B.book your order
C.be in the market
D.place a order with you