题目

阅读下面短文，从每题所给的 A、B、C 和 D 四个选项中选出可以填入空白处的最佳选项。The Thai governmentintends to further deepen its digital cooperation with Chinese technology companyHuawei, senior Thai officials said at a cloud event held in Bangkok this week. During the Powering Digital Thailand 2022 on Nov 17-19, Thai deputy PrimeMinister Prawit Wongsuwon said digital infrastructure(基础设施), such as5G, is crucial to Thailand's 1 and socialdevelopment, especially for the country's post-pandemic economic 2. Badly hit by the COVID-19 pandemic, the tourism实验中的变量主要有自变量、因变量和无关变量．下列控制无关变量的操作错误的是（ ）A．验证光合作用能产生淀粉的实验中，首先将实验植物做饥饿处理B．探究唾液淀粉酶的最适pH的实验中，先将每一组温度控制在37℃C．验证光合作用需要光照的实验中，将叶片的一半用黑纸包住D．探究唾液淀粉酶最适温度的实验中，每一组都加入等量的淀粉