【单选题】—Let' s go shopping,shall we? —_________
【判断题】采集新型冠状病毒肺炎患者的咽拭子应该采用二级防护或二级以上防护标准,必须佩戴头面部防护屏和呼吸道防护用品
【单选题】Which of the following statements is correct about the family’s response to Paul’s mockery?
A.
. Only the parents found it entertaining.
B.
Every member except Marriam was amused
C.
The brothers found it hard to appreciate.
D.
. Mariam also thought it was amusing
【单选题】pH =5.28的某溶液,[H+]为5.2480746×10-6 mol•L-1,其结果有效数字位数正确的是:( )
【单选题】真核生物细胞内存在着各类繁多、长度为21-23个核苷酸的小分子RNA(简称miR),它们能与相关基因转录出来的RNA互补,形成局部双链。由此可以推断这些miR抑制基因表达的分子机制是()
【单选题】小何有一次偷拿水果摊上的橙子被老师叫到了办公室,老师批评他:“为什么总是拿别人的东西?”小何低着头回答:“我也知道不对,就是有时忍不住。”这说明小何缺乏:
【单选题】John goes after what he wants () life.
【单选题】What kind of reference word is used in the fourth sentence to help connect the sentences together?