下列哪项不属心脏压塞征象（ ）
A．颈静脉怒张
B．血压下降，脉压变小
C．奇脉
D．第一心音亢进
E．心音遥远
参考答案：D
We should keep the habit of taking notes when the teacher _____. [ ]
A. will talk
B. would talk
C. is talking
烘干法测含水率时要求天平称量200g，分度值为（）。
A.0.1g
B.0.01g
C.0.001g
D.1.0g
