为保证儿童及时接受预防接种，医疗机构与儿童的监护人员应当
A．订立合同
B．共同协商
C．
D．
E．相互配合
参考答案：E
代谢性酸中毒时最突出的临床表现是（）。
A.呼吸浅而慢
B.呼吸深而快
C.神志欠清楚
D.腱反射亢进
E.心率加快
.
It was_________Asimov was eleven years old________ his talent for writing became obvious.
A．that, when
B．When, that
C．when, when
D．when, which
