以下皮肤病的水疱主要位于角质层下的是（）
A.寻常型天疱疮
B.白痱
C.大疱性类天疱疮
D.疱疹样皮炎
参考答案：B
设备在长期运行条件下，每年平均故障次数被称为（）。
补全对话，每空一词，使对话完整、通顺。
A: Hello! What's 1______ name?
B: My name is Linda.
A: Can you spell it, please?
B: 2______, L-I-N-D-A Linda.
A: 3______ 4______ are you?
B: I'm 5______.
A: Oh, I'm thirteen, too. What 6______ is your schoolbag?
B: It's blue.
A: Oh, it's very nice. I 7______ it very much. 8______ 9______ is it?
B: It 10______ 24 yuan.
