A.Paques
B.Nol
C.la fête du Printemps
D.la fête des mères
A.t’en
B.m’en
C.t’y
D.te le
A.H 2 Te > H 2 O > H 2 S > H 2 Se
B.H 2 Se > H 2 Te > H 2 O > H 2 S
C.H 2 S > H 2 Se > H 2 Te > H 2 O
D.H 2 Te > H 2 Se > H 2 S > H 2 O
A.Comment vous applez-vous?
B.Comment te appelles-tu?
C.Comment vous appelez-vous?
D.Comment t’appeles-tu?
半径同为R的两个几何球面开始时互相重合,今使其中一个球面固定,另一个球面从t=0开始匀速平动,速度大小为υ0。
(1)试求两球面刚好完全分离的时刻te;
(2)试求0<t<te时刻,两球面交点在第一球面大圆上作圆运动的向心加速度a心。
An appropriate title for the text is most likely to be
A.Fors and Againsts of DNA Testing
B.DNA Testing and It’s Problems
C.DNA Testing Outside the Lab
D.Lies behind DNA Testing
A.1-3
B.2-2.5
C.2
D.5
–– How is your brother these days?
–– He hasn’t been too well recently.
–– ______What’s the matter?
–– I think he ’s been overworking.
A: It ’ll be pleased to hear you ask after him.
B: That ’s not too bad.
C: I ’m sorry to hear that.
D: I ’ te ll him what you said.