下列四项膨胀土工程特性指标室内试验中,( )是用风干土试样。()
A.(A) 膨胀率试验
B.(B) 膨胀力试验
C.(C) 自由膨胀率试验
D.(D) 收缩试验
参考答案:C
In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. Spread spectrum simply means that data is sent in small pieces over a number of the(71) frequencies available for use at any time in the specified range. Devices using(72) spread spectrum (DSSS) communicate by (73) each byte of data into several parts and sending them concurrently on different (74) . DSSS uses a lot of the available (75), about 22 megahertz (MHz).
71()
A.continuous
B.high
C.low
D.discrete
项目决策阶段的主要任务是( )。
A.编制设计任务书
B.进行初步设计
C.编制项目建议书
D.编制可行性研究报告
E.进行合同磋商