滴眼液的制备
不能用于调节滴眼液渗透压的物质是()
A.葡萄糖
B.氯化钠
C.硼酸
D.硼砂
E.碳酸钠
参考答案:E
First impressions are the most lasting. After all, you never get ___ second chance to make ___ first
impression.[ ]
A. a; the
B. the; the
C. a; a
D. the; a
将探测器接收的信息转换为数字信号的是
A.信号放大器B.探测器C.A/D转换器D.信号比较器E.后组探测器