单项选择题

What is the main idea of the article

A．Plants that absorb metals are being studied by scientists.
B．Scientists are trying to create cancer-fighting crops.
C．Some wild plants can store micronutrients naturally.
D．Anti-cancer products in the foods are good to people's diet.

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热门试题

单项选择题

In many developing countries, people fall sick because ______.

A．they don't absorb enough micronutrients from their diet
B．they don't have plants that take up metal in their tissues
C．there is no locoweed in their countries
D．there is no iron and zinc containing in their food

单项选择题

The study finds out that ______.

A．eleven million adults could answer only the easiest written questions
B．more than forty percent of adults find it difficult to perform simple reading activities
C．blacks, Asians and Hispanics had the biggest increases in English reading skills
D．the best readers earn more money than those who lack simple reading skills