Thenumberoftallbuildings__________greatlyinTianjininthelastfewyears.
A、isincreasing
B、hasincreased
C、areincreased
D、haveincreased
—IsthereanythingelseIcandoforyou?
—______.
A、Nevermind
B、No,thanks
C、Nothingforyou
D、Yes,thanksalot
A、加密技术
B、数字签名技术
C、数字信封技术
D、数字水印技术
A、thingsofthissort
B、thesesortsofathing
C、thissortofthething
D、thissortofathing
新中国成立后，对外贸易在国民经济中处于重要的战略地位。()