Manystudents take Internet-based courses mainly because they can ____
A. earntheir academic degrees With much less effort
B. savea great deal on traveling and boarding expenses
C. select courses from variouscolleges and universities
D. work on the required courses whenever andwherever
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下列属于大额交易的是（）。
A. 一笔25 万元人民币的现金汇款
B. 当El 累计支取人民币18 万元
C. 个人银行账户之间当日累计45 万元人民币的款项划转
D. 单位银行账户之间一笔150 万元人民币的转账
连杆螺栓工作条件繁重，要求较高的强度和较好的塑韧性，应选用______钢。
According to the authors understanding, what is A1 Gores view on global warming？
A. It is a reality both people and politicians are unaware of.
B. It is a phenomenon that causes us many inconveniences.
C. It is a problem that can be solved once it is recognized.
D. It is an area we actually have little knowledge about.
对要求表面硬、耐磨性好、心部强韧性好的重载齿轮，则通常选用______钢经______热处理制造。
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