十进制数238转换成十六进制数为。 A: EF B: FE C: EE D: ED

background:url(2、png),url(1、jpg),url(3、png),url(4、jpg);},表示哪张图片处在最上层() A: 2、png B: 1、jpg C: 3、png D: 4、jpg

下列关于治疗指数计算方法正确的是： A: ED<sub >50</sub>/ LD<sub >50</sub> B: .LD<sub >50</sub>/ED<sub >50</sub> C: ED<sub >9</sub><sub >0</sub>/ LD<sub >1</sub><sub >0</sub> D: LD₁₀/ED₉₀

Add -ed or -ion to or remove them from the following words to form new words. -ed content ➝ 1)____________ compressed ➝ 2)____________ complicated ➝ 3)______________ -ion identify ➝ 4)_____________ justify ➝ 5)______________ qualify ➝ 6)______________ illustrate ➝ 7)______________ exhibition ➝ 8)______________ extend ➝ 9)______________ interpret ➝ 10)______________ plant ➝ 11)______________ perceive ➝ 12)______________

ED WEQWERQWRQWRQWR A: 1 B: 2 C: 3 D: 4

治疗指数最大的药物是（） A: AA药半数致死量（LD₅₀.=500mg，半数有效量（ED₅₀.=100mg B: BB药LD₅₀=100mg，ED₅₀=50mg C: CC药LD₅₀=50mg，ED₅₀=5mg D: DD药LD₅₀=500mg，ED₅₀=25mg E: EE药LD₅₀=100mg，ED₅₀=50mg

ask(ed) A: want(ed) B: pleas(ed) C: carri(ed) D: help(ed)

I got 1.bor(-ed, -ing) last time during the lection because the topic was totally not 2. interest(-ed, -ing) for me, it was honestly 3. tir(-ed, -ing) to be there for me.Where do you need an -ed prefix for adjectives here？ A: 1，2 B: 3 C: 4 D: 1

可靠安全系数是指（） A: LD/ED B: ED/LD C: LD/ED D: LD/ED E: ED/LD

一般而言，分子的电子、振动和转动能级差的大小顺序为 A: ΔEe＞ΔEv＞ΔEr B: ΔEe＞ΔEr＞ΔEv C: ΔEe＜ΔEv＜ΔEr D: ΔEe＜ΔEv＞ΔEr