（）是1s内产生1J能量的功率。
A.能量
B.帕斯卡
C.焦耳
D.瓦特
参考答案：D
买4个篮球344元，买5个足球280元，篮球和足球的单价各是多少元？
A love marriage, however, does not necessarily ____ much sharing of interests and responsibilities.
A．take over
B．result in
C．hold on
D．keep to
