检查右支气管时，应将受检者的头（）。
A.略抬高
B.摆平直
C.略向右偏
D.略向左偏
E.以上都不是
参考答案：D
黑非洲发展最主要的问题是：
A．人口问题
B．环境问题
C．粮食问题
D．资源问题
He kept a notebook, in which ______ the telephone number and email addresses of his friends. [ ]
A. wrote
B. have written
C. was written
D. were written
