正常细胞分裂次数是____的,癌细胞分裂次数也是____的。
根据图中所给的边长长度及角度,判断下列选项中的四边形是平行四边形的为( )
全球处于同一天太阳直射在( )
(____)1. A. Tuesday B. Thursday C. tomorrow
(____)2. A. ping-pong B. cartoon C. football
(____)3. A. me B. his C. her
(____)4. A. morning B. afternoon C. birthday
(____)5. A. erhu B. robot C. piano
Here is bike my uncle sent me last week. I believe it's fantastic one.
《Inorganic Syntheses》(无机合成)一书中,有一如图所示的装置,用以制备某种干燥的纯净气体。该装置中所装的药品正确的是( )