土石料场实际开采总量与坝体填筑量之比最大的土料是（）。
A.石料
B.砂砾料
C.反滤料
D.土料
参考答案：C
投资者预期某股票价格将上升，于是预先买入该股票，如果股票价格上升，便可以将先前买入的股票卖出获利。这种交易方式称为（）。
A.现货交易
B.期权交易
C.空头交易
D.多头交易
____ winter is still with us, and will be for a few more weeks, warm days may still be in the forecast for
your area. [ ]
A. As long as
B. Even though
C. Now that
D. Ever since
