核磁共振仪的兆赫数越高，仪器的性能越好，主要表现在______与______。

鸟类与其飞行行为相适应的结构特点是什么？

— So hard ______ in the past few months that he has made great progress in English.

— I can see that; only a few mistakes ______ in the exam.

A．has he worked; did he make

B．he has worked; did he made

C．he has worked; he made

D．has he worked; he made

脑出血

A．头痛伴癫痫发作
B．月经期发作频繁
C．头痛伴剧烈呕吐
D．头痛伴视力障碍
E．头痛伴神经功能紊乱

叶绍钧小说的现实主义特色和艺术风格表现在（）

A.冷静观察和客观描写

B.对笔下人物同情与讽刺兼备

C.结构严谨，精于布局

D.文学平实纯正

E.对小市民知识分子同情与讽刺兼备

升散疏泄