【简答题】已知某物质主要成分的化学式为XY 2 ,X原子的结构示意图为 ,X的阳离子与Y的阴离子的电子层结构相同。元素Z、W均为短周期元素,它们原子的最外层电子数均是其电子层数的2倍,Z与Y相邻且Z、W能形成一种WZ 2 型分子。 (1)m=________,该物质主要成分的化学式为________。 (2)Z、W元素的名称为________、________。 (3)下列说法正确的是________。 A...
【单选题】集中力作用处的剪支梁,其剪力图是( )。
【单选题】跨度为 4m 的简支梁,其剪力图如图所示,以下结论中错误的是 ____
A.
整个梁上作用有向下的均布载荷 q=1kN/m
C.
梁上必有集中力偶作用,其力偶矩为 4kN.m
【简答题】具内酯或内酰胺结构的生物碱在正常情况下,在____中其内酯或内酰胺结构可开环形成____而溶于水中,继之加____复又还原。
【判断题】Professional socks should be the same color of the suit and at least as dark as your suit.
【简答题】A dark suit is ________ to a light one....
【单选题】绝对计程仪航速是船舶在_______情况下的对地航速 I. 无风流;II.有风无流;III有流无风;W.有风流
【简答题】某电压信号源的内阻为ro,其开路输出电压为Vo1,接上某放大电路的输入端后,信号源的输出电压为Vo2,请计算该放大电路的输入电阻ri.
【单选题】How to dress if your interview is less formal?
A.
For men: Conventional dark-colored suit (black, navy or charcoal grey are good) with a conservative shirt: plain pastel shades or modest stripes and dark polished shoes.
B.
For men: wear nice slacks (not jeans, sweatpants, or shorts), a long-sleeve shirt with a collar that is tucked-in, and matching belt, shoes, and socks.
C.
For women: Conventional suit or coordinating jacket and knee-length skirt.
D.
For women: Don’t wear lots of make-up, perfume or jewellery.
【简答题】I ____________ a dark grey suit.