G蛋白的生理活性有赖于与()的结合以及具有()的活性而得名。
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现场焊接作业时,各种焊接设备及工具应放置稳固,不得侵入()
滚动轴承有哪些部分组成,按能承受外载荷的方式分为哪些类型?
舌骨上肌群包括二腹肌、下颌舌骨肌、茎突舌骨肌和颏舌骨肌4块。
A. 正确
B. 错误
What is the principal danger from the liquid in a half full tank onboard a vessel?()
A. Corrosion from the shifting liquid
B. Rupturing of bulkheads from the shifting liquid
C. Loss of stability from free surface effect
D. Holing of the tank bottom from the weight of the shifting liquid