A．) a fish to fry

B．) a nut to crack

C．) a song to sing

D．) an axe to grind

[单选题]C．G．UATEMALA CITY （Reuters） – A fish that lives in mangrove swamps（红树沼泽）across the Americas can live out of water for months at a time, similar to how animals adapted（适应）to land millions of years ago, a new study shows.The Magrove Rivulus, a type of

[名词解释] 裂缝（crack；fissure）

[单选题]crack表示中文（）。A . 粗糙B . 裂纹C . 缺陷

[单选题]A． crack in a cylinder liner can be caused byA．worn piston ringsB．installation of undersized sealing ringsC．operating the engine at low loadsD．restricted cooling water passages

[单选题]关于NUT中线癌，叙述正确的是A.高分化鳞状细胞癌B.只发生于儿童和青年C.癌细胞胞质PAS消化前后的阳性物质，不是糖原D.有C-KIT基因突变E.有

[单选题]22． What does the underlined word "cracks" mean in the text?A．缝隙B．表面C．夹层D．底部

[单选题]关于FISH的叙述正确的是A．FISH是原位杂交技术的一种B．具有荧光信号的高灵敏性和直观性特点C．特异性好、定位准确D．灵敏性高，与放射性探针相当E．经济、安全、探针稳定；实验周期短

[单选题]The underlined words “the evicted fish” in Paragraph 3 refer to .A． the fish beaten up B. the fish found outC． the fish fattened up D. the fish driven away

[单选题]F．ish is______and expensive at this time of the year in this area.A．in large measureB．to the minimumC．in short supplyD．to the maximum

[名词解释] fluorescencein situ hybridization ；FISH（荧光原位杂交）