微分环节的传递函数式为()。
A、A
B、B
C、C
D、D
参考答案:B
It is hoped that every student in our country will read ________.[ ]
A. a such good book
B. a good such book
C. such good a book
D. such a good book
女性,36岁,10小时前突然咯血约数十口。既往5年前曾患右肺结核治愈。查体无阳性体征。该患者应首选的治疗药物是()
A.呼吸兴奋剂
B.止咳剂
C.镇静剂
D.凝血剂
E.垂体后叶素