稻瘟病根据发生时期和危害部位,分别引起()、叶枕瘟、节瘟、谷粒瘟、穗颈瘟。
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下列各组传热膜系数α的数值大小(饱和蒸汽的压力相同)关系不正确的一组是()
A. 空气的α<水的α
B. 水蒸气冷凝时的α>水加热或冷却时的α
C. 弯管的α>直管的α
D. 水蒸气的滴状冷凝α>水蒸气膜状冷凝α
当事人履行合同时发现部分货物的价款没有约定,而且双方又未能达成补充协议。依据《合同法》,应按()的市场价格履行。
A. 订立合同时订立地
B. 履行合同时订立地
C. 订立合同时履行地
D. 履行合同时履行地
王昌龄曾写过:“黄沙百战穿金甲,不破楼兰终不还。”请问诗中的“楼兰”是指汉朝时期的哪个国家?
You are the network administrator for ExamSheet.net. Your computer has Windows 2000 Professional installed. You install an a new video card. When you restart the computer you receive the following message: **** Stop: 0x000000B4 - The video driver failed to initialize." The computer will not start in safe mode. You want your computer to start properly. What should you do?()
A. Start theRepairoption and select the option to locate and repair system files.
B. Start the computer in Safe mode and Select theEnable Boot Loggingoption.
C. Use the Recovery Console and repair the Master Boot Record.
D. Restart the computer in debug mode.