虎钳夹持圆柱形工件时，配合V形枕夹持较安全。（）
参考答案：对
填入一个适当的词，补全对话。
—Good morning!
—1______ 2______!
— What's your 3______?
—My name is Jack Smith.
—What's your 4______ name, please?
—It's Smith
—What's your 5______ 6______?
—It's 8931645
—OK, Thank you very much. Goodbye!
—Bye!
短波疗法的临床适应证为（）
A.关节炎
B.恶性肿瘤
C.活动性出血
D.青光眼
E.肺结核
