Currently 94% of Web users use either Internet Explorer or Firefox, but recently some new （71） have been developed that are beginning to attract attention. The browser Opera is becoming very（72）because of its speed, it is currently the world’s fastest browser, and because it is much smaller（73） existing browsers (it can almost fit on a single diskette). It can also （74）the last Web page you visited, so the next time you surf, you can start where you left off. And like the big two, you can get it for free; the catch is that you have to watch blinking ads in one corner, or pay $40 for the ad-free （75） of Opera.

单选题

Currently 94% of Web users use either Internet Explorer or Firefox, but recently some new （71） have been developed that are beginning to attract attention. The browser Opera is becoming very（72）because of its speed, it is currently the world’s fastest browser, and because it is much smaller（73） existing browsers (it can almost fit on a single diskette). It can also （74）the last Web page you visited, so the next time you surf, you can start where you left off. And like the big two, you can get

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单选题

The WHO says there is currently no evidence of human-to-human ______ of the virus.

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多选题

使用Web of Science数据库可以（）

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单选题

web /web/

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单选题

Main bearings for medium speed engines currently in use are of the ____ type, Similar bearing shells are employed for bottom end bearings

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