冬季影响我国东部海域的主要气团是（）。
A．变性极地海洋气团
B．变性极地大陆气团
C．变性热带大陆气团
D．变性热带海洋气团
参考答案：B
Nowadays, cellphones have features such as games ,music and calendars and more new functions___.
A．are added
B．have added
C．are being added
D．have been added
