A：猫的有尾性状是由显性基因控制的
B：自交后代出现有尾猫是基因突变所致
C：自交后代无尾猫中既有杂合子又有纯合子
D：无尾猫与有尾猫杂交后代中无尾猫约占1/2
My name is Anna.I have my lunch at school from Monday to Friday.I like my school lunch.On Mondays we have hamburgers and milk.On Tuesdays and Fridays we have tomato noodles and beef.I like Wednesdays because we often have sandwiches on Wednesdays.On Thursdays we often have noodles.
根据短文内容判断句子的正误。
The new discovery of oil is of great ______ to this area's economy.
下列现象中会造成血压升高的是（ ）
给下列句子加上标点。
①这正是前几天那片千万朵小花藏身的草地____ 此刻那些花儿一下子全冒了出来____ 顿时改天换地____
②我惊奇地想____ 它们为什么不是在温暖的阳光下冒出来____ 偏偏在冷风冷雨中拔地而起呢____ 小小的花儿居然有如此的气魄____ 我的心怦然一震____ 这一震____ 使我明白了生命的意味是什么____ 是——勇气 ____
