潜育期（incubation period）

[名词解释] 潜育期

[单选题]各种病的潜育期均不同，白粉病的潜育期是（）。A .1－2天B .4－5天C .10天左右D .15天以上

[单选题]The notice period for a hedge fund is best described as the period followin

[主观题]市场周期（Market period）

[名词解释] 侵入期（penetration period）

[名词解释] 隐蔽期（eclipse period）

[单选题]The period of valve overlap is when （）.A . the inlet valve is openB . the exhaust valve is openC . both valves are closeD . both valves are ope

[单选题]No specific period is given for the renewal of the lubricating oil filter element as this should be done（） a figure of 0√7 bars is shown on the gauge.A . whateverB . wheneverC . whereverD . whoever

[单选题]If the engine （） for a long period, there will be a danger of frost.A . must to stand inoperativeB . has to stand inoperativeC . must be stood idleD . will stand idle

[名词解释] 市场周期（Market period）