牛可视黏膜苍白可见于（）。
A.贫血
B.CO中毒
C.心力衰竭
D.胆管阻塞
E.氢氰酸中毒
参考答案：A
A British man who ____ to play practical jokes ____ his own humorous art work in four major New York
museums over the last two weeks. [ ]
A. liked; has secretly hung
B. likes; has secretly hung
C. had liked; secretly hung
D. has liked; secretly hung
人际关系形成的感情交流阶段的特点是( )。
A．不拘泥于正式场合交往模式的各种规则
B．双方的人际安全感尚未确立
C．彼此以诚相待
D．双方的人际关系已出现实质性变化
