干一行爱一行更要专一行，当前科学技术日新月异要求我们( )、敢于创新。
A．敢于冒险
B．提高修养
C．品行专一
D．钻研技术
参考答案：D
—Our holiday cost a lot of money.
—Did it? Well, that doesn't matter ________ you enjoyed yourselves.[ ]
A. unless
B. as far as
C. as long as
D. until
企业向海关申请注册登记是其取得报关资格的法定条件。（）
