氢冷发电机的压缩空气管道应有活动接头，当发电机以氢冷方式运行时，该接头应断开。（）
参考答案：对
How ________the woman is to save the boy from the danger of earthquake.
A．brave
B．interesting
C．natural
D．strange
用作片剂的糖衣层材料的是
A．5minB．10minC．15minD．30minE．60min
