使用锤子工作时,不准带(),锤柄、锤头不得有()。
参考答案:手套、油污
—I'm going to the English party now.
—______.[ ]
A. It's good for you
B. It's very kind of you
C. You are happy
D. Have a good time
微原纤维基因发生突变,引起的一种人类遗传性疾病是()
A.动脉粥样硬化(atherosclerosis,AS))
B.成骨不全(osteogenesisimperfect,OI)
C.胶原病(collagendiseasE.
D.马方综合征
E.威廉斯综合征(Williamssyndrome,WS)