1877年美国《纽约时报》曾报道：“当地（中国）商人往往将装满货物的商船‘挂羊头卖狗肉’式地‘过继’给任何一位欧洲人，佯装货物是他们的。”“当地（中国）商人”这样做主要是因为

苹果树不宜在热带栽种，柑橘树不宜在北方地区栽种，起制约作用的主要生态因素是（  ）

Dear Betty,

    I'm your eraser Jill. This afternoon you lost me in your classroom. Simon found me and gave me to your English teacher Ms. Green. Now Ms. Green's three keys and I are in Ms. Green's bag. The bag is yellow. It's on Ms. Green's desk. Please call Ms. Green at 718-0167 and ask her for me. You can come to the library, too. Ms. Green is in the library now.

Jill