蝎毒“染色剂”氯代毒素(Chlorotoxin)是由蝎子毒液中的一种蛋白质制成的,它可以选择性地绑定在癌细胞上,使癌症手术更加容易和高效。下列关于这种“染色剂”的说法不正确的是A.蝎毒“染色剂”的化学成分中含有C、H、O、N等大量元素B.氯代毒素能选择性地绑定在癌细胞上,可能与癌细胞细胞膜表面的糖蛋白有关C.氯代毒素已制成药物,对人体无毒害,患者可以用口服的方法摄入这种“染色剂”D.这种染色剂的合成、加工和分泌涉及的细胞器有核糖体、内质网、高尔基体、线粒体
Let's go climbing,shall we?
You _____ be joking!Don't you know I'm afraid of high places?( )
A.mayB.canC.mustD.should
Bad luck!I lost _______new pen yesterday.
Don't worry.I'll lend _____to you.( )
A.my;meB.mine;myC.mine;mineD.my;mine
Peter didn't tell his parents that he was going home because he wanted to give them a_______.( )
A.noteB.surpriseC.callD.gift
______pity!I missed ___one﹣hour speech by President Xi Jinping yesterday.( )
A.What;anB.How;anC.What a;theD.How;the
Shall we go to visit our teachers after this exam?
______.( )
A.Sounds greatB.You're welcome
C.It serves you rightD.Never mind