Vents are led from the engine to head tank （） from the cooling water.

[单选题]Vents are led from the engine to the head tank for the release of （） from the cooling water.A . airB . heatC . sludgeD . steam

[单选题]F．rom “Dreams of head-cutting!”(Paragraph 3), we learn that the writer.A． was mad at the sales agent.B． was reminded of the cruel pharaohC． wished that the sales agent would have had dreams.D． dreamed of cutting the sales agent’s head that night.

[单选题]Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.A . to stiffenB . to softenC . to loosenD . to wear

[填空题] 写出算法的功能。int L(head){node * head;int n=0;node *p;p=head;while(p!=NULL){ p=p->next; n++; }return(n);}

[单选题]If the head pressure of a reciprocating refrigeration compressor is excessiveA．the relief valve should open before the high pressure cutoutB．the relief valve should open and allow the excess refrigerant to flow to the receiverC．the high pressure cuto

[单选题]Who is the [head]of this delegation?A.captainB. leaderC. bestD. capital

[单选题]Who is the[ head]of this delegation?A.captainB. leaderC. bestD. capital

[单选题]The cylinder head, cylinder liner and （） form the combustion chamber.A . frameB . pistonC . crankcaseD . explosion plate

[单选题]Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.A . hullB . projectionC . graphitizationD . foundatio

[填空题] 发光强度在（）以下的LED叫做普通亮度LED，（）的LED叫做高亮度LED。