【单选题】【消耗次数：1】
被子植物的胚乳是（ ）。
①
单倍体
②
二倍体
③
三倍体
④
四倍体
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如果在一固定容器内，理想气体分子速率都提高为原来的二倍，那么（）
①
温度和压强都升高为原来的二倍；
②
温度升高为原来的二倍，压强升高为原来的四倍；
③
温度升高为原来的四倍，压强升高为原来的二倍；
④
温度与压强都升高为原来的四倍。
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①
正确
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错误
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