下列描述符合梗阻性肾病常见的病因是（）。A.动力性梗阻占梗阻病因的大多数 B.小儿肿

“When will your father _________ Shanghai?” “He ________  at 8:00 this Monday.”

A．arrive at, will arrive

B．arrive in , will arrive

C．arrive ,will arrive in

D．arrive, will arrive at

哪项不属驻波电子直线加速器的特点（）

A、分流阻抗高

B、频率稳定性好

C、束流负载影响小

D、结构紧凑体积小

E、加速管长

根据句意,选择单词的正确形式填空。

1. He said he        (is/was)going to the park.

2. Tom told me he       (will/would)call me the next day.

3. Jack said he        (goes/went) to the beach every day.

4. Kate said she       (can/could) finish it on time. .

5. He said,"My brother       (is/was) not here two years ago, but he (is/was) here now. "

显微镜凝集试验常用于检测哪种病原体感染时的血清抗体

A．解脲脲原体

B．肺炎衣原体

C．普氏立克次体

D．钩端螺旋体

E．衣氏放线菌

金属的气割过程实质是铁在纯氧中的（）过程，而不是（）过程。

A、燃烧、熔化

B、熔化、燃烧

C、熔化、气化

D、气化、熔化