A．nna was reading a piece of science fiction, completely ________ to the outside world.

[A] being lost

[B] having lost

[C] losing

[D] lost

[试题]Anna was reading a piece of science fiction, 怎么选择A．nnawasreadingapieceofsciencefiction,completely_______totheoutsideworld.A．)havingbeenlostB)tobelostC)losingD)lost

[单选题]I．单项选择， (15分)( )1． Nowadays science fiction isn’t as ___________ as cartoons among teenagers．A．popularB．more popularC． less popularD． the most popular

[名词解释] 分泌片（secretory piece）

[名词解释] 特性曲character piece

[单选题]A distance piece, known as a （） may be interposed between the rod and the bearing housing.A . bearing shellB . bearing linerC . compression plateD . lead wire

[单选题]A distance piece, with ground faces, may be interposed between the rod and the bearing housing, its thickness being chosen to ensure the correct （）.A . expansion ratioB . pressure ratioC . compression ratioD . clearance ratio

[单选题]A single piece（） fitted with bronze rings guides the piston in the cylinder liner.A . piston skirtB . piston crownC . guide wayD . cross-head

[单选题]A distance piece, with ground faces, known as a compression plate, may be interposed between the rod and the beating housing, its thickness being chosen to ensure the correct （）.A . compression pressureB . compression testC . compression ratioD . com

[单选题]We drop a piece of metal into a jar full of water, the metal will float if it weighs less than______.A． an equal amount of silverB． an equal amount of goldC． all the water in the jar nowD． the water that leaves the jar

[单选题]What reading approach is based on the assumption of reading as a guessing g