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【简答题】
有下列四种物质：①SiO2 ②HF ③NaHCO3 ④Na2O2 按要求填空（填序号）： （1）作为呼吸面具或潜水艇中供氧剂的是 。 （2）可以在玻璃上刻字、雕刻花纹的是 。 （3）可以作为食用碱，也是焙制糕点发酵粉的主要成份的是 。 （4）由它制成的光导纤维，抗干扰性能好，通信质量高，并且能防窃听，是当前信息社会必不可少的高技术材料，它是 。
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【简答题】We would like to inform. you that at present we can supply you with various kinds of men's leather shoes.(英译中)
【判断题】We would like to inform. you of at present we can supply you ( )various kinds of men&We would like to inform. you of at present we can supply you ( )various kinds of men's leather shoes.()
A.
正确
B.
错误
【单选题】十九大报告指出，坚决打赢脱贫攻坚战，确保到()年我国现行标准下农村贫困人口实现脱贫，贫困县全部摘帽，解决区域性整体贫困，做到脱真贫、真脱贫。
A.
二〇三五
B.
二〇三〇
C.
二〇二五
D.
二〇二〇
【单选题】They will _____ you everything you need once you start your scientific research. [ ]
A.
supply
B.
provide
C.
take
D.
offer
【单选题】坚决打赢脱贫攻坚战。确保到( )年我国现行标准下农村贫困人口实现脱贫，贫困县全部摘帽，解决( )整体贫困，做到脱真贫、真脱贫。
A.
二〇二五跨区域
B.
二〇二〇区域性
C.
二〇二五区域性
D.
二〇二〇跨区域
【单选题】From: Paul Richardson To: Samuel Johnson Date: Feb. 2 Subject: Work update Dear Mr. Johnson, We, at Business World Monthly, thank you very much for your review. It is such a pleasure to have people li...
A.
To ask Mr. Johnson to attend a book fair
B.
To explain a proposed project
C.
To notify Mr. Johnson of a changed deadline
D.
To confirm receipt of a payment
【简答题】We would like to inform you that ______ present we can supply you ______ various kinds of men's leather shoes.
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