单项选择 适中0.65 引用1 组卷97
During the novel coronavirus (新型冠状病毒) the distinction (区别) between a mask (口罩) and N95 mask is ________.
| A．unnecessary | B．worthless | C．important | D．uninteresting |
2020高二下·青海·学业考试
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We all got good grades, for our English teacher had given us________ time to get well-prepared for this test.
| A．sufficient | B．temporary | C．important | D．magnificent |
We should place ________ emphasis on development and security(安全), and develop nuclear energy on the base of security.
| A．equal | B．central | C．important | D．maximum |
As long as we persist in spreading scientific knowledge among the masses，all the strange beliefs are ________ to go out of our life.
| A．necessary | B．important | C．difficult | D．bound |
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