维生素D中活性最强的是
A.7-脱氢胆骨化醇B.25-羟胆骨化醇C.1,25-二羟胆骨化醇D.胆骨化醇E.1-羟胆骨化醇
参考答案:C
对苯唑西林的性质和作用的各条描述中,哪一条的说法最确切
A.本品有耐酶性能,适用于产生青霉素酶的细菌所引起的感染
B.本品对细菌产生的青霉素酶有抑制作用
C.本品适用于葡萄球菌产酶株所致的周围感染
D.细菌对青霉素耐药后可选用本品
E.本品适用于一切葡萄球菌所致的各种感染
根据句子的意思,用括号中所给汉语提示或英语单词的适当形式填空。(共10小题;每小题1分,计10分)
小题1:Our school library is _________(开放的) from Monday to Friday.
小题2:The moonlight is shining on the little girl ______(透过)the windows.
小题3: (千) of visitors come to Yangzhou every year..
小题4:Which picture is your favorite? The ______ (十二) one, I think.
小题5:Do you know the (重量)of six elephants?
小题6:The clothes on the table are those _____ (art)
小题7: His father was angry because he did his work _______(careful)
小题8:Our teacher often makes his lessons ___________(interest)
小题9:Just now I had a shower after ________(play) football for an hour .
小题10:Do you know the engineer _________(lie) under the tree?