氯乙烯慢性中毒的特异性损害为()
A.外周神经炎
B.造血系统病变
C.皮肤病变
D.肢端溶骨症
E.中枢神经系统的麻醉
参考答案:D
—Does he _______a small nose?—No, he doesn’t. He ______ a big nose.
A. has; has B. have; has C. has; have
用于保护变压器器的熔断器熔挂的选择为:按变压器侧定电流的()倍选配。
A.1
B.1.5
C.2-3
D.>3