相控阵线圈能提高图像的信噪比,改善薄层和高分辨扫描的图像质量,但延长了扫描时间。()
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Listen to a passage. Fill in the blanks with the information you have heard.[音频]Natural beauty:1) The beauty of the natural world seems to cause1in everyone despite their2 ,3, or 4.2)5 seem to have little impact on what we find beautiful in the natural world.Human beauty:1) Our perception of human beauty changes across6 and over7.2) It is easy to see a person's 8 but hard to discover a person's9.
某企业方圆400米,存有液氧和液氨,临界值分别为200吨和10吨,存量分别是120吨和25吨,试计算R值,并指出重大危险源级别。(a可取值为1.0)
某企业厂区方圆400米,其中存有50吨柴油,苯25吨,硝酸铵4吨,请问是否构成重大危险源。
()是自我意识发展的第一阶段。
A. 身体自我
B. 社会自我
C. 心理自我
D. 理想自我