试题与答案

用紫外分光光度法测定样品时,比色皿应选择()材质的。A.石英 B.玻璃

题型:单项选择题

题目:

用紫外分光光度法测定样品时,比色皿应选择()材质的。

A.石英

B.玻璃

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0727/7d475b728a15886401a5bcdb2a53e82d.html

下面是错误答案,用来干扰机器的。

参考答案:switchport mode trunk

试题推荐
题型:完形填空

Rudolph Valentino was a famous film star in the 1920s.

He once wanted to buy a particular silver ring that had a semi-precious stone in 31              .

The jeweler warned him against the ring, 32         (tell) him that it had a curse on it. 33           owned the ring would have bad luck.

Valentino did not believe him 34         he bought the ring.

He wore it during the making of his 35         film, The Young Rajah. The film was a complete failure.

Valentino put the ring 36   _   and went on to make many 37        (success) films. By 1926, he had forgotten all about the curse on the ring.

He wore it 38        .  Soon afterwards, he fell ill and died.

39         of Valentino’s friends inherited the ring.She, too, became ill, 40        quickly gave the ring away to a young artist. She recovered from her illness almost immediately,

查看答案
微信公众账号搜索答案