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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】When Laura Langanki found extra towels in the laundry smelling lemony fresh, she never【C1】______ that meant her 13 year-old son was 【C2】______ drugs. 'We were 【C3】______ three to four bottles of air f...
A.
believed
B.
dreamed
C.
assured
D.
thought
【单选题】The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in .
A.
clogged fuel injection pumps
B.
increased cylinder liner wear
C.
intake valve stem corrosion
D.
varnish deposit on pistons
【单选题】When Laura Langanki found extra towels in the laundry smelling lemony fresh, she never【C1】______ that meant her 13-year-old son was【C2】______ drugs. 'We were【C3】______ three to four bottles of air fre...
A.
believed
B.
dreamed
C.
assured
D.
thought
【单选题】pH = 9.0 的含有 5.0×10 -2 mol / L NaCN 和 1.0×10 -2 mol / L Hg(NO 3 ) 2 的溶液中,叙述 CN - 的物料平衡方程式正确的是 [ HCN 的 p K a = 9.21 , 生成 Hg(CN) 4 2- 络合物 ]
A.
[ CN - ] + 4[ Hg(CN) 4 2- ] = 5.0×10 -2
B.
[ CN - ] + [ Hg(CN) 4 2- ] = 5.0×10 -2
C.
[ CN - ] + [ HCN ] + 4[ Hg(CN) 4 2- ] = 5.0 ×10 -2
D.
[ CN - ] + [ HCN ] + [ Hg(CN) 4 2- ] = 5.0 ×10 -2
【单选题】The burning of fuel oil in a diesel engine having a high sodium content, will cause ＿.
A.
corrosion and grooving of exhaust valves
B.
corrosion and gumming of the fuel injection pump
C.
salt deposits in the exhaust manifold
D.
slag deposits in the fuel injection equipment