I would like a job which pays more, but ____ I enjoy the work I'm doing at present. A.in other words B. on the other hand C. for one thing D. as a matter of fact
Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict(预测) how just three grams less a day would affect heart disease in the United
It was in the Ming Dynasty __________ the Great Wall was rebuilt to keep out northern tribes _________ threatened the Chinese heartland. A．that; that B．that; where
∴x1＜0,x2＜0，即两根为负实数.
）=（-x1）+
≥2，