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【单选题】
定义在R上的函数f（x）满足f（x+y）=f（x）+f（y）+2xy（x，y∈R），f（1）=2，则f（-2）等于（ ）A.
2
B.
3
C.
6
D.
9
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举一反三
【简答题】Rosa, ¡qué guapa hoy con el nuevo vestido (连衣裙) !
【简答题】outbreak; tentative; eliminate; exterior; furnish; intellectua;l qualification; startle; dynamic; rigorous We didn't understand Jack 's sudden ________ of anger.
【简答题】¡Qué guapa ________ tu hoy con esta blusa!
【简答题】We didn't understand how difficult it was to (分发)a national paper
【单选题】We didn't understand how difficult it was to __ a national paper.
A.
distribute.
B.
attribute.
C.
disturb
【简答题】过一点任意线段变形前后的()是唯一确定的,因此方向余弦是可以确定的。
【单选题】We didn't understand how difficult it was to ______a national paper
A.
Send in
B.
send for
C.
send off
D.
distribute
【简答题】He told us to use our dictionaries to _______any words we didn't understand. [A] look for [B]look out [C]look up [D]look at
【单选题】From her ___ expression, we know that she didn't understand the meaning. [ ]
A.
excited
B.
exciting
C.
puzzled
D.
puzzling
【单选题】We didn't understand how difficult it was to ______a national paper
A.
send in
B.
send for
C.
send off
D.
distribute
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